Improvement in sash-cord guides



w. SHAW.

Sash-Cord Guides.

'NO. 138,944. P'atentedMay13.187 3- Attorneys,

AM. PHoTM/THosRAPn/c ca Mr (emu/1 115.; P900555 UNITED STATES PATENTOFFICE.

WILLIAM SHAW, BROOKLYN, NEW YORK.

IMPROVEMENT lN SASH-CORD GUIDES Specification forming part of LettersPatent No. 138,944, 'dated May 13, 1873; application filed March 22,1873.

. of New York, have invented a new and Improved Sash-Gord Guide; and Ido hereby declare that the following is a full, clear, and

exact description of the same, reference being had to the accompanyingdrawing, forming a part of this specification.

The invention consists in constructing the inside of a sash-pulley caseand the ends of the pulley itself so that loose balls may be appliedabout the shaft, as hereinafter described and pointed out in the claim.

Figure 1 is a sectional elevation, showing sash, pulley, case, and cord.Fig. 2 is a sectional elevation of part of a sliding door. Fig. 3 is across-section of 'Fig. 2 on the line 00 00. Fig. 4 is an end elevationof the sheave.

A represents a short tubular case, screwed into a window-frame, B, or adoor, (3. D represents fiat surfaces on opposite sides of the interior,and E the shaft on which the pulleys F are arranged. G represents endchambers in the rollers, and I little anti-friction metal balls placedin the chambers around the rods E to take the pressure of the rollersand lessen the friction. The rods E are riveted and made fast at theends to the case A. The rollers will project at the end of the case, as

shown in Figs. 1 and 2, for the sash-cord J, on the rail K of a slidingdoor, to clear the case. The pulleys F are curved at L to narrow them atthe edges, to clear the wall of the tube and remove surplus metal. Theballs will be made of hard iron or steel.

For a sash-pulley two rollers will be used, as represented in Fig. 1, ifthe frame B be of sufficient thickness to require it, but one will do ifthe frame is not so thick. The case will extend through the frame, fromthe front side to the chamber behind, for the sash weight.

For a door-sheave a short case, with the roller projecting from one endonly, will be screwed up into a hole in the bottom, as shown in Fig. 2.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is-

The case A having flat surfaces D in which are journaled the rod orpulley-shaft E, and

the rollers or pulleys F having end chambers G G, combined with sets ofloose balls placed in said end chambers, as and for the purposeWitnesses: Y

A. P. THAYER, T. B. MOSHER.

